Printing and dyeing sewage treatment equipment and treatment method

Abstract

The invention discloses printing and dyeing sewage treatment equipment which comprises an air flotation machine body, a partition plate is connected in the air flotation machine body, an air dissolving system is arranged on the side portion of the air flotation machine body, the air flotation machine body is divided into a reaction area, an air flotation contact area and a separation area through the partition plate, and a foam scraping device is arranged on the upper side of the separation area. A feeding pipe is arranged above the air flotation machine body and extends to the upper end of the reaction area, stirring mechanisms are arranged in the reaction area, stirring paddles of the two stirring mechanisms extend into the reaction area, and the foam scraping mechanism comprises a driver, a steering plate, a connecting assembly, a mounting frame and a conveying mechanism. The driving machine is fixedly installed on one side of the installation frame, the steering plate is movably connected to the surface of the conveying mechanism, and the connecting assemblies are connected between the installation frame and the conveying mechanism and connected with the steering plate. The device has the beneficial effects that the structure is simple and compact, the antimony removal rate is high, and the content of antimony in discharged water can reach the discharge standard.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and in particular to a printing and dyeing sewage treatment device and a treatment method. Background Art

[0002] When synthesizing polyester fiber, the raw material of polyester, terephthalic acid and ethylene glycol need to use an antimony-containing catalyst. For example, antimony acetate and ethylene glycol antimony are currently the most efficient and economical catalysts, which can almost help achieve a 100% conversion rate. During the synthesis process, the antimony element will be evenly dispersed in the polyester fiber in a free state. This kind of fiber enters the dyeing factory, and during the desizing and alkali reduction process, the free antimony will enter the wastewater and precipitate. Limited by factors such as technology, treatment costs, and management, industrial wastewater treatment has always been a difficult point in water pollution control. The discharge of industrial wastewater in my country is huge. After the industrial wastewater that does not meet the discharge standards is discharged into the water body, it pollutes surface water and groundwater. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the shortcomings of the prior art, the present invention provides a printing and dyeing wastewater treatment equipment and method, which has the advantages of simple and compact structure, high antimony removal rate, and the antimony content in the external drainage can meet the emission standards, thereby solving the problem of industrial wastewater that does not meet the emission standards being discharged into the water body and polluting surface water and groundwater.

[0005] (II) Technical solution

[0006] In order to achieve the above advantages of simple and compact structure, high antimony removal rate, and antimony content in external drainage meeting the discharge standard, the specific technical scheme adopted by the present invention is as follows:

[0007] A printing and dyeing wastewater treatment device, which comprises an air flotation machine body, wherein the air flotation machine body is connected with a partition plate inside, a dissolved air system is arranged on the side of the air flotation machine body, and a reaction zone, an air flotation contact zone and a separation zone are formed by partitioning through the partition plate, a foam scraping device is arranged on the upper side of the separation zone, a feed pipe is arranged above the air flotation machine body, the feed pipe extends to the upper end of the reaction zone, a stirring mechanism is arranged in the reaction zone, and stirring paddles of two groups of stirring mechanisms extend to the inside of the reaction zone, the foam scraping mechanism comprises a driving machine, a steering plate, a connecting assembly, a mounting frame and a conveying mechanism, wherein the driving machine is fixedly mounted on one side of the mounting frame, the steering plate is movably connected to the surface of the conveying mechanism, the connecting assembly is respectively connected between the mounting frame and the conveying mechanism, and is connected to the steering plate.

[0008] A steering seat is installed at the lower end of the steering plate, a sliding groove is provided on one side of the steering seat, and the arrays of steering seats are respectively installed at the lower ends of the steering seats. The arrays of steering seats are connected by adjusting ropes, and an electric regulating valve is provided on one side of the adjusting rope.

[0009] The air flotation contact area is provided with a release device, which includes a bubble generator, a distributor, and an air flotation tank. The bubble generator is used to generate a large number of microbubbles in water. The diameter of the microbubbles is usually between -μm.

[0010] The dissolved air system includes a dissolved air tank, an air storage tank, an air compressor and a high-pressure pump group. The air flotation tank is a circular steel structure. In the air flotation tank, dissolved air water and wastewater are fully mixed, and suddenly released to generate violent agitation and vortex, forming a large number of micro bubbles.

[0011] The microbubbles combine with the suspended matter in the wastewater, causing the suspended matter to float up, and the clean water is discharged from the outlet pipe.

[0012] A sludge area is arranged at the side of the separation area, a clean water area is arranged below the sludge area and a water pump is arranged on the clean water area, the water pump is connected with a pipeline, and is connected with the air dissolving tank through the pipeline.

[0013] The reaction zone is provided with a flocculant and a coagulant aid, and the flocculant and the coagulant aid enter the reaction zone to complete the flocculation reaction.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the present invention provides a printing and dyeing wastewater treatment device and treatment method, which has the following beneficial effects:

[0016] It can efficiently remove organic matter and inorganic salts from sewage, and the quality of the treated water meets the discharge standards; the use of biological treatment methods reduces the use of chemical agents and reduces secondary pollution; the design of the sludge treatment unit ensures that the remaining sludge is properly handled, reducing the pressure on the environment; the entire treatment process has a high degree of automation, is easy to operate, and has low maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It corresponds to Figure 1A top view of

[0020] Figure 3 is a schematic structural diagram of the foam scraping device 7 of the present invention;

[0021] Figure 4 is a schematic structural diagram of the steering plate 72 of the present invention;

[0022] Figure 5 is a schematic structural diagram of the steering plate 72 of the present invention;

[0023] Figure 6 is a schematic structural diagram of the steering plate 72 of the present invention;

[0024] Figure 7 It is a schematic structural diagram of the release device 51 of the present invention.

[0025] In the figure: the air flotation machine body 1, the partition 2, the dissolved air system 3, the reaction zone 4, the air flotation contact zone 5, the separation zone 6, the scraper 7, the drive motor 71, the steering plate 72, the connecting assembly 73, the mounting frame 74, the transmission mechanism 75, the steering seat 721, the sliding groove 722, the release device 51, the bubble generator 52, the distributor 53, and the air flotation tank 54. DETAILED DESCRIPTION

[0026] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] According to an embodiment of the present invention, a printing and dyeing wastewater treatment device and a treatment method are provided.

[0028] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-7As shown, a printing and dyeing wastewater treatment device according to an embodiment of the present invention comprises an air flotation machine body 1, wherein a partition 2 is connected to the inside of the air flotation machine body 1, a dissolved air system 3 is arranged on the side of the air flotation machine body 1, and a reaction zone 4, an air flotation contact zone 5, and a separation zone 6 are formed by partitioning through the partition 2, and a scraping device 7 is arranged on the upper side of the separation zone 6, a feed pipe 8 is arranged above the air flotation machine body 1, and the feed pipe 8 extends to the upper end of the reaction zone 4, a stirring mechanism 9 is arranged in the reaction zone 4, and stirring paddles of two groups of stirring mechanisms 9 extend to the inside of the reaction zone 4, and the scraping mechanism 7 comprises a driving machine 71, a steering plate 72, a connecting assembly 73, a mounting frame 74, and a conveying mechanism 75, wherein the driving machine 71 is fixedly mounted on one side of the mounting frame 74, the steering plate 72 is movably connected to the surface of the conveying mechanism 75, and the connecting assembly 73 is respectively connected between the mounting frame 74 and the conveying mechanism 75, and is connected to the steering plate 72.

[0029] A steering seat 721 is installed at the lower end of the steering plate 72, and a sliding groove 722 is provided on one side of the steering seat 721. The arrays of steering seats 721 are respectively installed at the lower ends of the steering seat 72, and the arrays of steering seats 721 are connected by adjusting ropes, and an electric regulating valve is provided on one side of the adjusting rope.

[0030] The air flotation contact area 5 is provided with a release device 51, which includes a bubble generator 52, a distributor 53, and an air flotation tank 54. The bubble generator 52 is used to generate a large number of microbubbles in the water. The diameter of the microbubbles is usually between 20-80 μm. The microbubbles have a high surface area and adsorption capacity, and can effectively combine with the suspended matter in the sewage to reduce the specific gravity of the suspended matter, so that the suspended matter floats to the water surface to form scum.

[0031] The air dissolving system 3 comprises an air dissolving tank, an air storage tank, an air compressor and a high-pressure pump assembly, and a liquid level controller is arranged on the air dissolving tank 3. Air is forcibly dissolved in water to form air-dissolving water. When the air-dissolving water is suddenly released, the dissolved air is precipitated in the form of microbubbles, which fully contact and adhere to the floccules in the wastewater, causing the floccules to rise to the water surface, thereby achieving solid-liquid separation.

[0032] The flotation tank 54 is a circular steel structure, in which the dissolved air and wastewater are fully mixed and suddenly released to generate violent agitation and vortex, forming a large number of microbubbles. The microbubbles combine with the suspended matter in the wastewater to make the suspended matter float, and the clean water is discharged from the outlet pipe.

[0033] The distributor 53 evenly distributes the separated clean water and sludge in the tank to ensure the uniformity and stability of the treatment effect.

[0034] A sludge area is arranged at the side of the separation area 6, and a clean water area is arranged below the sludge area and equipped with a water pump. The water pump is connected with a pipeline and connected with the gas dissolving tank 3 through the pipeline.

[0035] The reaction zone 4 is provided with a flocculant and a coagulant aid, and the flocculant and the coagulant aid enter the reaction zone 4 to complete the flocculation reaction.

[0036] A method for treating printing and dyeing wastewater, the specific steps are as follows:

[0037] Step 1: Preprocessing

[0038] Adjust pH value: Use acid-base regulator to adjust the pH value of sewage to a range suitable for flotation treatment (usually 6.5-7.5);

[0039] Coagulation reaction: add coagulant (such as polyaluminium chloride PAC or aluminium sulfate) to the sewage, and mix the coagulant and sewage thoroughly by stirring to form fine flocs;

[0040] Step 2: Flotation process

[0041] Dissolved air system: air is dissolved in pressurized water through a water pump to form dissolved air water. Commonly used dissolved air methods include water pump suction, jet suction and pressure dissolved air;

[0042] Release system: Introduce dissolved air water into the reaction area of ​​the flotation tank, and suddenly reduce the pressure through the releaser to release the dissolved air in the form of tiny bubbles; these microbubbles will attach to the suspended matter and flocs in the sewage;

[0043] Air flotation separation: Due to the buoyancy of air bubbles, suspended matter and flocs with air bubbles float to the water surface to form scum, while clear water is discharged from the bottom of the pool;

[0044] Step 3: Scum treatment

[0045] Scum scraper: Use a mechanical scraper to scrape the scum floating on the water surface into a scum tank for further processing or disposal;

[0046] Step 4: Discharge or reuse of clean water

[0047] Filtration: Filter the discharged clean water to remove the remaining tiny suspended matter;

[0048] Disinfection: Disinfect the water as needed, such as using chlorine or ultraviolet light;

[0049] Discharge or reuse: The treated water can be discharged into natural water bodies or reused in the production process after further treatment.

[0050] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A printing and dyeing wastewater treatment equipment, characterized in that: The invention comprises an air flotation machine body (1), wherein the air flotation machine body (1) is connected to a partition plate (2) inside, and an air dissolving system (3) is arranged on the side of the air flotation machine body (1), and a reaction zone (4), an air flotation contact zone (5), and a separation zone (6) are formed by partitioning through the partition plate (2), and a foam scraping device (7) is arranged on the upper side of the separation zone (6), and a feed pipe (8) is arranged above the air flotation machine body (1), and the feed pipe (8) extends to the upper end of the reaction zone (4), and a stirring mechanism (9) is arranged in the reaction zone (4), and two sets of stirring mechanisms (9) are arranged in the reaction zone (4). The stirring paddle of the stirring mechanism (9) extends into the interior of the reaction zone (4); the scraping mechanism (7) comprises a driving machine (71), a steering plate (72), a connecting assembly (73), a mounting frame (74), and a conveying mechanism (75); the driving machine (71) is fixedly mounted on one side of the mounting frame (74); the steering plate (72) is movably connected to the surface of the conveying mechanism (75); the connecting assembly (73) is respectively connected between the mounting frame (74) and the conveying mechanism (75), and is connected to the steering plate (72).

2. A printing and dyeing wastewater treatment equipment according to claim 1, characterized in that: A steering seat (721) is installed at the lower end of the steering plate (72), a sliding groove (722) is provided on one side of the steering seat (721), and the plurality of steering seats (721) are respectively installed at the lower end of the steering seat (72), and the plurality of steering seats (721) are connected by an adjusting rope, and an electric regulating valve is provided on one side of the adjusting rope.

3. A printing and dyeing wastewater treatment equipment according to claim 1, characterized in that: A release device (51) is provided in the air flotation contact area (5), and the release device (51) comprises a bubble generator (52), a distributor (53), and an air flotation tank (54). The bubble generator (52) is used to generate a large number of microbubbles in water, and the diameter of the microbubbles is usually between 20-80 μm.

4. The printing and dyeing wastewater treatment equipment according to claim 1, characterized in that: The gas dissolving system (3) comprises a gas dissolving tank, a gas storage tank, an air compressor and a high-pressure pump group.

5. The printing and dyeing wastewater treatment equipment according to claim 3 is characterized by: The air flotation tank (54) is a circular steel structure. In the air flotation tank (54), dissolved air water and wastewater are fully mixed and suddenly released to generate violent agitation and vortex, thereby forming a large number of microbubbles.

6. The printing and dyeing wastewater treatment equipment according to claim 1, characterized in that: A sludge area is arranged on the side of the separation area (6), and a clean water area is arranged below the sludge area and is equipped with a water pump. The water pump is connected to a pipeline and is connected to the air dissolving tank through the pipeline.

7. The printing and dyeing wastewater treatment equipment according to claim 1, characterized in that: The reaction zone (4) is provided with a flocculant and a coagulant aid, and the flocculant and the coagulant aid enter the reaction zone (4) to complete the flocculation reaction.

8. A method for treating printing and dyeing wastewater, the specific steps are as follows: Step 1: Preprocessing Adjust pH value: Use acid-base regulator to adjust the pH value of sewage to a range suitable for flotation treatment (usually 6.5-7.5); Coagulation reaction: add coagulant (such as polyaluminium chloride PAC or aluminium sulfate) to the sewage, and mix the coagulant and sewage thoroughly by stirring to form fine flocs; Step 2: Flotation process Dissolved air system: air is dissolved in pressurized water through a water pump to form dissolved air water. Commonly used dissolved air methods include water pump suction, jet suction and pressure dissolved air; Release system: Introduce dissolved air water into the reaction area of ​​the flotation tank, and suddenly reduce the pressure through the releaser to release the dissolved air in the form of tiny bubbles; these microbubbles will attach to the suspended matter and flocs in the sewage; Air flotation separation: Due to the buoyancy of air bubbles, suspended matter and flocs with air bubbles float to the water surface to form scum, while clear water is discharged from the bottom of the pool; Step 3: Scum treatment Scum scraper: Use a mechanical scraper to scrape the scum floating on the water surface into a scum tank for further processing or disposal; Step 4: Discharge or reuse of clean water Filtration: Filter the discharged clean water to remove the remaining tiny suspended matter; Disinfection: Disinfect the water as needed, such as using chlorine or ultraviolet light; Discharge or reuse: The treated water can be discharged into natural water bodies or reused in the production process after further treatment.

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